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Trachyphyllia geoffroyi

(Audouin, 1826)

Colonies are flabello-meandroid and free-living. They are usually hourglass shaped, up to 80 millimetres in length with one to three separate mouths. Large, fully flabello-meandroid colonies are uncommon. Valleys have large regular septa and paliform lobes and a large columella of tangled spines. Polyps are fleshy. When tentacles are retracted during the day a large mantle extends well beyond the perimeter of the skeleton. This retracts if disturbed. At night tentacles in several rows are extended from the expanded oral disc inside the mantle. The mouth is approximately 10 millimetres across.

Colour: Polyps, especially the mantles, are often brightly coloured, usually yellow, brown, blue or green.

Habitat: Inter-reef environments and on soft substrates around continental islands. Frequently found with other free-living corals: Heteropsammia (Dendrophylliidae), Heterocyathus (Caryophylliidae) and the fungiids, Cycloseris and Diaseris<

Abundance: Rare on reefs, common around continental islands and some inter-reef areas.

Similar species:

Taxonomic note: Source reference: Veron (2000). Taxonomic references: Chevalier (1975), Veron, Pichon and Wijsman-Best (1977), Veron and Hodgson (1989). Additional identification guides: Veron (1986), Sheppard and Sheppard (1991), Nishihira and Veron (1995).

Map displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Trachyphyllia geoffroyi.  Philippines.  A fully developed flabello-meandroid colony.  Charlie Veron.

Trachyphyllia geoffroyi.Philippines.A fully developed flabello-meandroid colony.Charlie Veron.

Trachyphyllia geoffroyi.  Indonesia.  Typical shape of a flabello-meandroid colony.  Gerry Allen.

Trachyphyllia geoffroyi.Indonesia.Typical shape of a flabello-meandroid colony.Gerry Allen.

Trachyphyllia geoffroyi.  Great Barrier Reef, Australia.  An hourglass shaped colony.  Roger Steene.

Trachyphyllia geoffroyi.Great Barrier Reef, Australia.An hourglass shaped colony.Roger Steene.

Trachyphyllia geoffroyi.  Indonesia.  The mantle of colonies can be very large and fleshy.  Valerie Taylor.

Trachyphyllia geoffroyi.Indonesia.The mantle of colonies can be very large and fleshy.Valerie Taylor.

Trachyphyllia geoffroyi.  Great Barrier Reef, Australia.  A voracious feeder at night.  Ed Lovell.

Trachyphyllia geoffroyi.Great Barrier Reef, Australia.A voracious feeder at night.Ed Lovell.

Trachyphyllia geoffroyi.  Great Barrier Reef, Australia.  Showing a small colony.

Trachyphyllia geoffroyi.Great Barrier Reef, Australia.Showing a small colony.

Trachyphyllia geoffroyi.  Great Barrier Reef, Australia.  Showing immature corallites.

Trachyphyllia geoffroyi.Great Barrier Reef, Australia.Showing immature corallites.

Trachyphyllia geoffroyi.  Great Barrier Reef, Australia.  Showing costae.

Trachyphyllia geoffroyi.Great Barrier Reef, Australia.Showing costae.

Trachyphyllia geoffroyi.  Great Barrier Reef, Australia.  Showing a solitary corallite.

Trachyphyllia geoffroyi.Great Barrier Reef, Australia.Showing a solitary corallite.

Trachyphyllia geoffroyi.  Great Barrier Reef, Australia.  Showing common valley formation.

Trachyphyllia geoffroyi.Great Barrier Reef, Australia.Showing common valley formation.

Trachyphyllia geoffroyi.  Great Barrier Reef, Australia.  Showing whole colony.

Trachyphyllia geoffroyi.Great Barrier Reef, Australia.Showing whole colony.

Trachyphyllia geoffroyi.  Great Barrier Reef, Australia.  Showing highly fused valleys.

Trachyphyllia geoffroyi.Great Barrier Reef, Australia.Showing highly fused valleys.

Trachyphyllia geoffroyi.  Great Barrier Reef, Australia.  Showing highly fused valleys.

Trachyphyllia geoffroyi.Great Barrier Reef, Australia.Showing highly fused valleys.